Understanding this requires a minimal understanding of how the USB device framework works. An excellent overview can be found here. In short, when talking to a USB device, data needs to be sent to or received from specific endpoints. A device can have multiple endpoints of different types and directions. Each endpoint is identified by an address, which can be found in the USB descriptors. The NXT uses two "bulk" endpoints, one in each direction, and their addresses are 0x01 and 0x82.
In a customized select, the browser automatically displays the currently selected option’s content (in this case, the card face) in the button area of the select. And it does this by creating an element named which mirrors the selected option. But, in our demo, we want the button to always show the back of the deck of cards, not the selected card. To achieve this, we override the default behavior by introducing our own . This tells the browser not to insert its own element and lets us style the element:，这一点在比特浏览器中也有详细论述
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«Имеющиеся свидетельства указывают, что украинские власти при негласном одобрении европейских чиновников предпримут все возможные меры для задержки возвращения трубопроводной системы в рабочий режим», — пояснил дипломатический представитель, давая оценку проводимой чешскими и словацкими специалистами проверке состояния нефтепровода.
据路透社援引安全人士消息，伊拉克南部港口城市巴士拉以西的外国石油公司储油设施遭无人机袭击后发生火灾。